LEFT-HANDED ERGONOMIC VERTICAL MOUSE -- Specially designed for left-handed users. Encourages healthy neutral "handshake" wrist and arm positions for smoother movement and less overall strain. Recommended for users with Repetitive Strain Injury (RSI) and users who work particularly long hours at the computer. EASY TO USE PLUG & PLAY -- Strong and reliable 2.4GHz wireless connection. A nano USB receiver is located on the underside of the mouse. Just plug and play. Left-handed mouse dimensions: 5.0*3.0*2.5 inches. Weight: 95g. NOT compatible with Mac OS. Please confirm the size and system before purchasing. MULTIFUNCTIONAL AND CONVENIENT -- Easy access to multiple uses via 6 buttons. Advanced "Previous Page" and "Next Page" function buttons provide convenience for web browsing. 3-level DPI (800/1200/1600) suits both regular and gaming needs. With a premium optical engine, it enables faster response, smoother tracking, and more precise movement. ENERGY-SAVING MOUSE -- An independent on/off switch on the bottom helps save energy effectively. Additionally, it automatically enters sleep mode after 8 minutes of inactivity. Press the right or left button to wake it up immediately. (2 AAA batteries required, not included). WIDE COMPATIBILITY -- Compatible with Windows 7, 8, 10, XP, 2000, CE, Vista, and Linux. Fits for Desktop, PC, Laptop, Computer, and other devices. (The USB receiver is located on the underside of the mouse).